Pictures of the day: 16 March 2012

...They have also made minuscule models of London's Tower Bridge and St. Stephen's Cathedral in Vienna. The high-precision-3D-printer at TU Vienna is orders of magnitude faster than similar devices. This opens up completely new areas of application, such as in medicine. "Until now, this technique used to be quite slow", says Professor Jürgen Stampfl from the Institute of Materials Science and Technology at the TU Vienna. "The printing speed used to be measured in millimetres per second - our device can do five metres in one second."Picture: TU Wien / Rex Features